Question

i am an alkaline earth metal. you will find me in the same period as the lanthanide elements. who am i? view periodic table tap on an option below to select or deselect an answer. thallium (tl) lanthanum (la) francium (fr) radium (ra) barium (ba) lutetium (lu) cesium (cs) astatine (at)

Explanation:

1. First, identify the period of Lanthanide elements: Lanthanides are in Period 6 of the periodic table.
2. Next, filter options to only elements in Period 6: Thallium (Tl), Lanthanum (La), Barium (Ba), Lutetium (Lu), Cesium (Cs), Astatine (At) fit this.
3. Then, identify alkaline earth metals: these are elements in Group 2 of the periodic table.
4. Finally, match the Group 2 element from the Period 6 options: Barium (Ba) is the only Group 2 (alkaline earth) element in Period 6 among the choices.

Answer:

Barium (Ba)